Machine for filing gin-saws



(No Model.)

E..W. SOUTH.

MACHINE FOR FILING GIN SAWS.

No. 254,400. Patented Feb. 28,1882. I

WITNESSES: x INVENTOR:

ATTORNEYS.

'nearlya semicircle, and provided at their outer UNITED STATES PATENTOrricn.

ELlAS WHITFIELD SOUTH, OF ANDERSON COURTHOUSE, SOUTHQAROLINA.

MACHINE FOR FILING GIN-SAWS.

SPECIFICATION forming part of LettersPatent No. 254,400, dated February28, 1882.

-Applioation filed November 1 1881. (N0 model.) I

To all whom it may concern Be it known that I, ELIAS WHITFIELD SOUTH, ofAnderson Court House, in the county of Anderson and State of SouthCarolina, have invented a new and Improved Gin- Saw-Filing Machine; andI do hereby declare that the following is a full, clear, and exactdescription of the same, reference being bad to the accompanyingdrawings, forming part of this specification, in which- Figure 1 is aplan view of my improved ginsaw-filing machine, and Figs. 2, 3, 4, and 5are detail views of the same.

My invention relates to gin-saw-filiug machines; and it consists in thepeculiar construction and arrangement of the parts, as hereinafter morefully set forth.

In the accompanying drawings, a represents a verticalrectangular'fra-me, provided with pointed pins 1), projecting from itsunder part, adapted to catch in a plank to hold the machine steady whilethe files are operated.

c 0 represent two curved arms,bolted at their ends to the upright armsof the rectangular frame a, opposite each other, and forming ends withtwo parallel straight arms, d d, with a slot, e, between them for theintroduction of several of the saws of the saw-cylinder to be sharpened,the latter being removed fromthe gin-frame and supported horizontally ontrestles or in other suitable manner. The outer ends of the arms at arecurved and joined together, as shown in the drawings.

f represents a cranked shaft journaled in the parallel horizontal sidesof the frame a, and provided with a fly-wheel, g, of the usualconstruction.

It represents an interiorly-geared wheel journaled on a short verticalshaft, 5, projecting from the upper horizontal bar of the frame a, andprovided with a handle, j, by means of which a rotary motion is impartedto the gearwheel h, which meshes with a small pinion,'k, fast on theupper'end of the crank-shaft f, and imparts a rapid rotary motion to thelatter.

lrepresents a short pitman journaled to the crank of the crank-shaftf inthe usual manner. The outer end of the pitman l is provided with ajournal, m, which passes through a hole in the curved inner end of thelower file-holder, a, and is secured thereto by a pin or other suitabledevice, The lower file-holder, n, is curved at its outer end andprovided with a hole, 0, for the reception of the outer end of athree-cornered file, the latter lying against the holder and secured toit near its rear end by means of a cap, 1), provided with a hole,through which a screw passes and thence through a hole in the lowerfile-holder. By this construction afile may readily be inserted orremoved, when desired. The inner curved end of the lower file-holder, a,is provided with a projecting pin, g, which passes through oppositeholes in the curved rear end of the upper tile-holder, n, which isconstructed in a similar manner to the lower file-holder, and

carries a file'se'cured thereto in the same manner as described for thelower file-holder. It will be seen that by this construction the upperfile-holder is pivoted or hinged to the lower holder at its rear curvedend, and that the files cross each other.

1" represents a flat or other spring, the rear end of which is insertedbetween the pin q and the bent end of the upper file-holder, n, theopposite end of the spring 1" bearing against the lower file-holder, n,whereby the files are kept pressed together when in operation.

8 represents a loose guide for the file-holders, consisting of anangular piece of metal of the form of a staple provided with a roller inits upper end and pivoted between the arms at by the bolt t, thefile-holders passing through the loose guide.

u represents a strap secured -to one or both of the arms 01, andprovided with a stirrup or treadle, c, at its lower end to hold themachine down to its work.

The operation of the machine is as follows: The saw-cylinder to besharpened is removed from the gin and supported horizontally ontrestles, or in any other suitable manner, a plank being laid across thetrestlcs on one side of the saw-cylinder for the support of the machineon which the frame a rests, the pins on the under side of the lattercatching in the plank and holding the machine in position, with severalsaws projecting through the slot between the arms. The handle is thenturned and the ends of the files made to embrace a tooth of the gin-sawto be filed. The treadlestrap is then tightened and power applied, whena rapid reciprocating and vibratory motion is imparted to the filesfiling the tooth on both sides, the gin-saw being held stationary duringthe filing of a tooth by the strap and treadle 22. When a tooth issufficiently filed the pressure of the foot on the treadle is lessened,when the forward and vibratory movement of the files grasping the sawturns it one tooth, the pressure on the saw-cylinder being lessened. The.pressure of the foot on the treadle is then increased, holding the sawstationary, and a second tooth is filed, and so on for the remainder.

It will be seen that in my construction 'no special device is requisiteto move the sawoylinder a tooth after a tooth has been filed, thereciprocating and vibratory movement of the files moving thesaw-cylinder one tooth, when the pressure on the saw-cylinder islessened, thus constituting an automatic take-up.

What I claim as new is- 1. The combination, with the file-holders n n,provided with a spring, 1", pressing the tiles together, and pivoted toeach other at their inner ends and crossing each other, and operated bymechanism, substantially as described, to impart a reciprocating andvibratory motion to the files, of the frame a c 61, substantially asdescribed, and for the purpose set forth. 7

2. The combination, with the file-holders n n, providedwith a spring,1", and pivoted to each other at their inner ends, and operated bymechanism, substantially as described, of the frame a c d, pivotedguides, and strap a, provided with a. stirrup or treadle, o,substantially as described, and for the purpose set forth.

3. The combination, with the file-holders 'n n, pivoted to each other attheir inner ends, crossing each other, and provided with a spring, 0, ofthe pitman l, crank-shaft f, and gears h 70, whereby a reciprocating andvibratory movement is given the file-holders, substantially asdescribed.

4. The combination of the fileholders n n, constructed as set forth,spring 1', pitman l, crank-shaft f, gears h It, frame a c d, pivotedguide 8, and strap u, provided with a stirrup or trcadle, substantiallyas described, and for the purpose set forth.

5. The combination, with the lower file holder, a, curved at its innerend, and provided with the pin g, and also with a hole, 0, at its curvedouter end, of the upper fileholder, at, pivoted to the lower file-holderat its inner end, and provided with a hole at its bent outer end, spring1', pressing the files together, and caps 19, removably secured to thefile-holders, substantially as described, and for the purpose described.

E. WHITFIELD SOUTH.

Witnesses:

SoLoN O. KEMoN, CHAS. A. PETTI'I.

